Telephone system with service-meters.



G. D. WOLF.

TELEPHONE SYSTEM WITH SERVICE METERS.

APPLICATION FILED MAY 21, I914.

Patented Mar. 14, 1916.

3 SHEETSSHEET I.

AAAAAA W H 2' 2755555. r- B EW G. D. WOLF.

TELEPHONE SYSTEM WITH SERVICE METERS. APPLICATION man MAY 21, 1914.

1,175,396. Patented Mar. 14,1916.

3 SHEETS-SHEET 2.

Z Z r T [YA/527227.27 jg fgf em- 51702521? F M' HZYZJFZYELZ rm: COLUMBIA PLANOGRAPH 1:0,. WASHINGTON. D. c.

G. D. WOLF.

TELEPHONE SYSTEM WITH SERVICE METERS.

APPLISATION FILED MAY 21. 1914.

1,175,896. Patented Mann, 1916.

3 SHEETS-SHEET 3.

Z/ 2772755555: ILFZYZEP: QM. QBMX QQA fleargeflZ/Z/b/f rm; COLUMBIA PLANOGRAPI; C0,, 'ASIIXNLETON. n. r,

"TED @TAT annr were GEORGE D. WOLF, OF CHICAGO, ILLINOIS, ASSIGNOR '10 KELLOGG SYVI'IGI-IBOABD & SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TELEPHONE SYSTEM WITH SERVICE-METERS.

Specification of Letters Patent.

Patented Mar. 14:, 1916.

Application filed May 21, 1914. Serial No. 840,018.

To all whom it may concern:

Be it known that I, GEORGE D. VVoLr, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Telephone Systems with Service-Meters, of which the following is a specification.

My invention relates to telephone systems with service meters and is more particularly designed to provide a system in which two meters are provided for each operators position, one meter registering all of the completed calls made in that position and the other meter registering all uncompleted calls. The uncompleted call meter in the particular embodiment of the invention as shown herein registers all of the attempted and uncompleted connections except those where the called subscriber answers and these latter are registered on the completed call meter only. I

In the particular form of the invention as herein disclosed I utilize a slow acting relay which places, whenever a call is answered, both the uncompleted call and the completed call meters in circuit relationship with other apparatus so that one or the other of these meters may be operated depending upon whether the called subscriber answers or whether the call is not completed.

In the accompanying drawings illustrating several applications of my invention, Figure 1 represents adiagrammatic view of a common battery telephone system having a two conductor cord circuit equipped in accordance with my invention; Fig. 2 is a view similar to that of Fig. 1 showing my invention as applied to a three conductor cord circuit, and Fig. 3 is a view similar'to that of Fig. 1 showing my invention as applicable for combination common battery and mag neto lines. 7

Referring more particularly to Fig. 1, I

' show two substations A and B united respectively by means of conductors 1 and 2 with a common battery exchange E. The substation instruments at the substations A and B may have any of the well known forms of battery equipment, one applicable form being illustrated herein which will be readily intelligible. The lines terminate in jacks 3 and 4 having the customary line relay 5and cut off relay 6. v

The novel features of the system are those in connection with the cord or link circuit. The cord circuit herein has the answering plug 7 and the calling plug 8. Answering clearing out relay 9 controls the answering clearing out lamp 10 in connection with the sleeve relay 11. Whenever the plug 7 is inserted, the circuit through the sleeve relay 11 is completed through the cut oil relay 6, thus placing the lamp 10 in condition to be con trolled by the calling relay 9. Similarly the calling clearing out relay 12 connected between the ground and the tip strand on the calling side controls the calling clearing out lamp 13 in connection with the sleeve relay 1 1. The sleeve relay is actuated whenever the calling plug 8 is inserted in the jack by the completed connection through the cut out relay 6 of the line leading to the substation 13. Thus whenever the relay 14 is energized as when the plug 8 is inserted but the called subscriber has not yet answered, 7

then the circuit through the clearing out lamp 13 is completed from ground at 15, through battery 16, lamp 123, conductor 17, armature 18 of the relay 14: to ground. l Vhenever the supervisory relay 12 is then energized its armature 19 breaks the circuit through the lamp 13.

The novel features of my invention consist in the addition of the completed call meter 20 and uncompleted call meter 21 to this cord circuit for registration purposes. A magnet 22 controls the actuations of the meter 20 and the magnet 23 controls the actuations of the meter 21. Both of these magnets are initially placed in a receptive condition by the slow acting relay 24.

. Whenever the plug 7 is inserted in the jack 4 as when answering a call then relays 9 and 11 are energized. Thereupon the operator actuates her listening key 25, closing circuit between springs 26 and 27, thus establishing a circuit which mav be traced from the ground at 28 through battery, through the I slowacting relay 24:, conductor 29, back contact 30, armature 31 of the relay 14', spring 27, spring 26, conductor 32, front contact 83, armature 34, of the relay 9, front contact 35, armature 36 of the relay 11, to ground, thus energizing the slow acting relav 24 and cansing it to attract all three of its armatures respectively 87, 38 and 39. The attraction of the. armature 38 completes the circuit of the magnet 22 of the completed call meter to the front contact 40 of the relay 12, and atcircuit which can be traced from the ground,

' at 28 through battery, through slow acting relay 24, front contact 43, armature 37 front contact 44, armature 42, conductor 45, back contact 46, armature 18, to ground so that the relay 24 is thus locked in energized condition.

Now should the operator in calling find that the called for line- B is busy, then the plug 8 is not inserted in the jack but'the plug 7 is withdrawn from the jack of the calling part'y. lVithdrawal of the plug 7 releases the armature 42, which thereby establishes a circuit from the ground at 47 through battery, through magnet 23, armature 39, front contact 48, back contact 41, armature 42, conductor 45, back contact 46,

armature 18 to ground, thus causing the magnet 23 to operate the meter one stroke. Of course, the release of the armature 42 also breaks the circuit through the relay 24, but relay 24 being slow acting, its armatures are not released until after the circuit through the magnet 23 has been completed. In case the called for line is not busy, the calling plug 8 is inserted in the jack, thereby operating the calling sleeve relay 14. a This oper ation switches the control of the slow release relay 24 from the make contact 44 of the answering sleeve relay 11 to the break contact 49ofthe calling supervisory relay 12,

thus keeping the slow acting relay 24 at-. tracted through the circuit which may be tracedfrom the ground at 28, through battery, through relay 24, contact 43, armature 37, conductor 50, armature 51, front contact 52, contact 49, armature 19, front contact 53, armature 18 toground. At-the same time the circuit is open to the uncompleted call meter to prevent operation in case the answering plug is removed, this occurring by the break between the contactelements 18 and '46. At the same time the circuit from the slow release relay through the listening key and answering supervisory relay is opened by the relay 14, by the breaking-of the circuitthrough the contact elements 30 and 31 so as to permit the release of the slow acting relay 24 should the call be completed. When the called'party answers the relay 12 operates, thereby completing the circuit through the magnet 22, which can be traced from the ground at 54, through battery, through magnet'22, front contact 55, armature 38, front contact 40, armature 19, front contact 53, armature 18, to ground, thus registering a completed call uponthe meter 20 and at the same time breaking the circuit througlrthe slow acting'relay 24 at the contact elements 19 and49. This againdisCon:

- quent use of the cord for a further connection. 7

It will of course be understood that the meters 20 and 21 are common to a posltion and also that the various batteries shown are merely shown as separate batteries to avoid confusion as these batteries are intended to be the representation for one common battery whlch will be quite obvious. In case the called subscriber does not answer, then the slow release relay remains locked up until both plugs are removed, at which time the circuit through the: uncompleted call meter magnet 23ris established between the contact elements 41 and Y42 and an uncompleted call registered before the slow release relay is deenergized. As will be readily apparent the unconipleted call is registered no matter which plug is first removed since the cir cuit of the magnet 23.is not established, 'nor the locking circuit ofthe slow release relay interrupted until both relays 11 and 14 are in their deenergized positions.

By referring more particularly to Fig. 2, the system is shown as applied to a three conductor cord circuit. The meters 20 and 21 arelagain controlled through the agency of the slow acting relay 24 and its armatures 38 and39. Upon closing the listening key a circuit is established from the ground at 28, through battery, through relay 24, conduct-or 29, back contact 30, armature 31, spring 27, spring 26, conductor'32, the front contact 33, armature 34, front contact 35 armature 36 to ground. When the relay 11 is deenergized the circuit from the uncompleted call meter can be traced (if the call is not completed) from the ground at 47, throughbattery, through magnet 23, contact 56, armature 39, back contact 57, armature 58, conductor 59, back contact 41, armature 36, to ground. Actuation of the calling sleeve relay 14 without energization of the calling supervisory relay 12 does not cause a registration on the completed call meter, but still permits a registration on the uncompleted call meter when the plug 7 is withdrawn, under similar conditions to those explained in connection with Fig. 1. Now should the call be completed however in the system'as shown in Fig. 2, then acircuit is established through the magnet 22, which can-be traced from the ground at 54, through battery, magnet 22, front contact 60, armature 38, front'contact 40, armature 19, front contact 53,' armature 18 to ground, at the same time breaking the circuit through the slow acting relay 24 similarly to the manner describedin connection with Fig. 1.

The circuit shown in Fig. 3, is, so far as essentials of this system are concerned, similar to the systems shown and described in Figs. land 2, the cord circuit however be mg adapted for a common battery to magneto connection. Answering and calling.

sleeve relays 11 and 1 t are shown and answering supervisory and calling supervisory relays 9 and 12* respectively, and impedance coil ,61 is provided interposed etween the grounded terminal of the battery and the tip strand. of the cord circuit. The operation in general is similar when a connection is made with the line circuit consisting of the line conductors '62 and 63 leading to the magneto substation C, with this exception that the relays 14" and 12 are not energized when the plug 8 is inserted in the jack G l. Consequently the insertion and withdrawal of the plug 8 will have no eiiect on the magnets 22. 2;; or Ql, and with the exception of the condition to be presently related an uncompleted call-willv be recorded on the meter 21 whenever the called magneto line is busy, or whenever the called magneto line subscriber does not respond. Even if the called magneto subscriber does respond and does not ring off an uncompleted call will be registered However when the magneto substation as is required when a conversation is completed operates the generator 65 to signify a completed conversa-tion, then a circuit is established through the coil 66, of the relay 1:2 which can be traced from the terminal 67 of the generator (35, through line conductor 68, sleeve contact 68, of the plug 8, sleeve conductor 6 conductor 70. coil 66, back contact 71, armature 72, conductor 7 3, tip strand 74-, tip 75, conductor 62, spring 76, contact terminal 77, to the other terminal of the generator 653, thus energizing the relay 12 Thereupon the circuit is broken at the contact elements l9 and 19, "thus deenergizing the relay 24-, but before this relay 2% releases its armatures establishing a contact between the elements 1.9 and 40, thus registering a call upon the meter 20.

From what has been described the nature ol'f my invention will be readily clear to those skilled in the art, and it will also be clear that changes and modifications can readily be made withoutdeparting from the spirit of my said invention.

ldaving however thus described several :lornis which my invention may take, what 1 claim as new and desire to secure by Let ters iatent is:

-1. In a systemof the character described the combination with entering subscribers lines, of a. cord circuit having meter mechanism for independently registering both partial connections and completed connections, and means controlledby the condition ofa called line to control the selective actuation of said meter mechanism.

2. In a system of the character described &

the combination with entering subscribers lines, of a cord circuit having meter mechanism for independently registering both partial connections and completed connections, means whereby said meter mechanism is placed in condition for operation upon the connection of said cord circuit with a calling line, and means associated with said cord circuit operable upon disconnection of said cord circuit to actuate said meter mechanism to register a partial connection.

3. In a system of the character described the combination with entering subscribers lines, of a cord circuit having meter mechanisms for independently registering both partial. connections and completed connections, means whereby said meter mechanism is placed in condition for operation upon the connection of said cord circuit with a call ing line, means associated with said cord circuit operable upon disconnection of said cord circuit to actuate said meter mechanism to register a partial connection, and means associated with said cord circuit operable upon response of a called party to render said second aforesaid means ineli'ectual to register a partial connection.

l. In a system of the character described the combination with entering subscribers lines, of a cord circuit having meter mechanism for independently registering both partial connections and completed connections, means whereby said meter mechanism is placed in condition for operation upon the connection of said cord circuit with a calling line, means associated with said cord circuit operable upon disconnection of said cord circuit to actuate said meter mechanism to register a partial connection, and means associated with said cord circuit operable upon response of a called party to render said second aforesaid means ineffectual to register a partial connection, and actuating said meter mechanism to register a completed connection.

5. In a system of the character described the combination with entering subscribers lines, or" a cord circuit having meter mechanism for independently registering both partial connections and completed connections, means whereby said meter mechanism is placed in condition for operation upon the connection of said cord circuit with a calling line, means associated with said cord.

circuit operable upon disconnection of said cord circuit to actuate said meter mechanism to register a. partial connection, and means associated with said cord circuit operable upon the receipt of a disconnect impulse from a' called line to register a completed connection.

6. In a system of the character described the combination with entering subscribers lines, of a cord circuit having meter mechanism for independently registering both parlac tial connections and completed connections, a slow acting relay whereby said meter mechanism is placed in condition for operation upon the connection of said cord circuit with a calling line, means associated with said cord circuit operable upon disconnectionof said cord circuit to actuate said meter mechanism to register a partial connection,and means associated with said cordcircuit operable upon response or" a called party to render said second aforesaid meansineifectual to register a partial connection.

r 7. In a system of the character described the combination with entering subscribers lines, of a cord circuit havlng meter mechanism for independently registerlng both partial connections and completed connections, a slow acting relay whereby said meter mechanism is placed in condition for operation uponthe connection of said cord circuit with a calling line means associated with said cord circuit operable upon di'scon'neo tion or said cord circuittoactuate said me ter mechanism to register apartial connection, and means associated with said cord circuit operable upon response of axcallcd party to render said second aforesaid means inefiectual to register a partial connection,

and actuatingsaid meter mechanism to register a completed connection.

8. In a system of the character described the combination with entering subscribers lines, of a cord circuit having meter mechanism for independently registering both partial connections and completed Vconnections, a slow acting relay whereby said meter mechanism is placed in condition for operation upon the connection of said cord circuit with acalling line, means associated -with said cord circuit operable upon disconnection of said cord circuit to actuate said meter mechanism to register a partial connection, and means associatedwith said cord circuit operable upon the receiptfof a disconnect impulse from a called line to register a completed connection. V

9. In a system of thecharacter described the combination with entering subscribers lines, of a cord circuit having meter mechanism for independently registering both partial connections and completed connections, a T slow acting relay whereby said meter mechanism is placed in condition foroperation'upon the connection, of said cord circuit with a calling line, a relay associated with said cord circuit operable upon disconnection of-said cord circuit to actuate said meter mechanism to register a partial connection and means associated with said cord circuit operable upon response of a called party to render said second aforesaid relay ineffectual to register a partial connection.

'10. In a system of the character described the combination "with entering subscribers ineffectual to register a partial connection,

and actuating said meter mechanism to register a completed connection. Y

' 11. Ina system of the character described the combination with entering subscribers lines, of a cord circuit having meter mech anisni for independently registering both partial connections and completed connec-' tions, a slow acting relay whereby said nieter mechanism is placed in condition for operation upon the connection of said cord circuit with a calling line, a relay associated with said cord circuit operable upon disconnection of saidcordcircuit to actuate said meter niechanlsm to register a partial connection,'-and means associated with said cord circuit operable upon the receipt of a dis connect impulse from a called line to register a completed connection. 7 7

12. In a system of the character described the combination with entering subscribers lines, of a cord'circuit having meter mechanism for independently registering both par- I tial connections and completed connections,

a slow acting relay whereby said meter mechanism is placed in condition for operation upon the'connection ofsaid' cord circuit with acalling line, a relay assoclated with I said cord cirouitioperable upon disconneo' tion of said'cord circuit to actuate said meter mechanism to register a partial connection, and a relay associated with said cord circuit operable upon response of a called party to render said second aforesaid relay ineifectual nection.

13. In a system of the character described the combination with entering subscribers" lines, of a cord circuit having meter mechanism for independently registering both partial connections and completed connections,

a slow acting relay whereby said meter mechanism is placed in condition for operation upon the connection of said cord cir cuit with a calling line, a relay associated with said cord circuit operable upon disconnection of said cord circuit to actuate said meter mechanism to register a partialconnection, and a relay associated WlillrSEtltl to register a partial coni cord circuit operable upon response of a called party to render said second aforesaid relay inefl'ectu'al to reglster a partialiconnection, and actuating said meter mechanism to register a completed connection.

14. In a system of the character described "he combination with entering subscribers lines, of a cord circuit having meter mechanism for independently registering both partial connections and completed connections, a slow acting relay whereby said meter mechanism is placed in condition for opera tion upon the connection of said cord circuit with a calling line, a relay associated with said cord circuit operable upon disconnection oi said cord circuit to actuate said meter mechanism to register a partial connection, and a relay associated with said cord circuit operable upon the receipt of a disconnect impulse from a called line to register a completed connection.

15. A telephone system comprising a calling and a called line, a cord circuit for connecting said lines, a meter associated with said cord circuit for registering completed connections, a second meter for registering incompleted connections, and means for operating either of said meters, said means being controlled by the condition of the called subscribers line.

16. In a telephone system, a plurality of subscribers lines, cord circuits for completing connections between said lines, meter mechanism common to said cord circuits for registering both partial and completed connections, and means controlled by the condition of a called line to control the selective actuation of said meter mechanism.

17. A telephone system comprisingsubscribers lines, a cord circuit for connecting said lines, a meter device associated with said cord circuit for registering completed connections, a second meter device for registering incompleted connections, and means for operating either of said meter devices, said means being controlled by the condition of the called subscribers line.

18. A telephone system comprising subscribers telephone lines, link circuits, meter mechanism associated with said link circuits for registering both completed and incompleted connections, and electromagnetic means under subscriber control to control the selective actuation of said meter mechanism.

19. In a telephone system the combination of subscribers telephone lines, of a cord circuit provided with meter mechanism for registering both partial connections and completed connections, means responsive to the connection of the operators telephone to said cord circuit for placing said meters in condition to be operated, and means for controlling the selective actuation of said meter mechanism.

20. A telephone system comprising subscribers lines, a cord circuit provided with a meter for registering completed connections and a meter for registering incompleted connections, means responsive to the connection of the cord circuit to said lines as calling lines for placing said meters in operative condition, and subscriber con-- trolled means for selecting the meter to be operated.

21. -A telephone system comprising a plurality of telephone lines, a cord circuit for completing connections between said lines, a pair of meter devices for registering completed and incompletecl connections, and means controlled by the condition of a called connected line to control the selective actuation of said meter devices.

22. A telephone system comprising subscribers lines, meter mechanism located at the central exchange for independently re istering both partial connections and completed connections, means responsive to the connection of a calling one of said lines to a trunk circuit for placing said meter mechanism in condition for operation, and means controlled by the condition of a called one of said lines to control the selective actuation of said meter mechanism.

Signed by me at Chicago, county of Cook, and State of Illinois, in the presence of two witnesses.

GEORGE D. W'OLF.

Witnesses:

B. OBRIEN, M. R. Roorrroiu).

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

